Improvement in pump-piston packing



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TO ALL WHOM IT MAY CONCERN:

Be it known that I, M. J. ALTHOUSE, of Waupun, in the county of Fond duLac, have invented a new and useful Improvement on Packing forPump-Buckets; following is a full, clear, and exact description thereof,reference being ha making a part of this specification, in which- Figure1 is an external view of a wooden pump-bucket with my improvedpackingapplied to it.

Figure 2 is a horizontal section through tlg. l, taken at the point a:x.'

Figure 3 is a vertical section through the pump-bucket.

Figure 4 is a horizontal section through the pump-bucket, taken abovethe valve.-

Figure 5 is a sectional view, similar to that of iig. B, showing thepacking contracted.

Figure 6 shows two of the packing rings.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention relates to a new and improved expansible packing, whichis applicable to the w bucket shown and described in my Letters Patentdated on the 13th day of November, 1856.

The nature of my invention consists in an expansiblle packing, which iscomposed of a soft substance, such as leather or India rubber, and ahard substance, such `as metal or wood, applied in the form of ringswithin an annular chamber formed in the circumference of a pump-bucketpiston, in such manner that the pressure of the column of water abovethe piston will, when desired, cause an expansion of the hard and softrings, and thus pack the piston in its upward strokes, as will behereinafter explained. 'It also consists in edge of a soft expansiblepacking ring from bein expansible rings of wood, metal, or otherinflexible substance, applied on both sides of the softer ring, as willbe hereinafter described.

To enable others skilled in the art to understand my invention I willdescribe its construction and operation.

In the accompanying drawings, A represents the hollow cylindricalpiston-head of the pump-bucket, and B is the arched stock or extension,to which the piston-rod is attached. C represents the ordinary valveused for pump-buckets, for covering the central opening through thepiston-head A; and a represents an annular recess, whichlis made in thecircumference of the head A for receiving the packing, as shown in gs.2, 3, and 5. Two holes bb are made through the upper portion of thepiston-head, which holes enter the annular chamber a behind the packing,and allow the column of water, which is above head A when it is raised,to press/the packing outward against the bore of the pump. When thepacking is new it is designed to have it fit snugly against the boroofthe pump without pressing it outward by the water, as above stated,for which purpose the passages b ,can be closed by the valves orcut-ofi` plates c c on top 'of the piston. When the packing becomesconsiderably worn, so as to work loose, the valves c c are opened moreor less, to allow the weight of water above the piston to get behind andpress out the packing. Within the annular recess a I introduce packingrings D E, the outer edges of which project slightly beyond thecircumference of the piston-head, so as to press with greater or lessforce against the bore ofthe pump-stock. The intermediate ring D may bemade ofvle'ather, as shown in figs. 2 and 6, or it may be made of Indiarubber, as shown in gs. 2 and 5. If this ring is of leather it must becut as shown in fig. 6, to allow of its application in its recess a; butif this intermediate ring is of India rubber it need notbe cut, as itcan be stretched and passed over the piston-head and into its recess.The width of these intermediate rings should be such as to leave a spacebehind them, as shown in the sectional views of the drawings. The ringsE may be made of wood, as in iig. 3; or of metal, as in figs. 5 and 6;or of any other hard and inflexible-substance. They should be made oftwo or more sections, so that they will expand simultaneously with theintermediate V beyond the circumference of the piston-head A., as shownin g. 3. The metallic or wooden rings may be made in two sections; butIprefer to divide each one of these` rings into three sections orsegments, as shown in g. 6, so that they will expand and contractuniformly, and afford a better support for the softer rings, which areplaced between them. It will be. seen from the above descrptionthat theouter edge of the soft packing ring and State of Wisconsin, and I dohereby declare that the d to the accompanying drawings,

ooden pumpprotecting the outer D is confined and supported between upperand lower expansible rings, which latter will prevent the saidprojecting portion of the soft packing from being crushed upward ordownward.

g crowded out of place, and rapidly worn out, by means of.

packing ringD, a'nd sustain that vportion ofthis latter ring which isexposed' Having described my invention, what I claim as new, and desireto secure by Letters Patent, is

1. Providing for sustaining a leather, rubber, or other soft packing,between expansible rings or segments, so as to protect the exposedportions of the soft packing, substantially us described.

2. The combination of they expansible hard metal or wood rings and therubber or other soft rings, all constructed and applied substantially inthe manner and for the purpose herein described.

d M. J. ALTHOUSE.

Witnesses z E. HOOKER, A. Nunn.l

